In Systolic Heart Failure, What Effect Does the Renin-Angiotensin-Aldosterone System

question 4

Multiple Choice

In systolic heart failure, what effect does the renin-angiotensin-aldosterone system (RAAS) have on stroke volume?

• A)Increases preload and decreases afterload
• B)Increases preload and increases afterload
• C)Decreases preload and increases afterload
• D)Decreases preload and decreases afterload

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Definitions:

Deleterious Allele

A genetic variant that tends to have a negative effect on the fitness or survival of an organism.

Fixed Genetic Locus

A specific location on a chromosome where the genetic variation has become identical across all members of a population due to evolutionary processes.

Allele

A variant of a gene that occurs due to mutation and is located at an identical location on a chromosome, representing one of two or more possible versions.

Genetic Drift

A mechanism of evolution that results in the change of the frequency of alleles in a population due to random sampling of organisms.